▎ 摘　　要

NOVELTY - Graphene/metal nano belt composite conductive ink comprises 1-20 pts. wt. graphene, 1-5 pts. wt. metal nano belt, 1-20 pts. wt. nano conductive carbon black, 0-20 pts. wt. graphite, 1-25 pts. wt. polymer adhesive, 0.5-10 pts. wt. auxiliary agent and 10-70 pts. wt. solvent, where the metal nano belt has bandwidth of less than 200 nm, length of 1-50 mu m, length and width ratio of 10:1-2500:1, and thickness of less than 100 nm. USE - The composite conductive ink is useful in printed conductive circuit (claimed) and printed electronic industry. ADVANTAGE - The composite conductive ink: reduces metal content; has excellent conductivity, low cost, simple preparation, excellent controllability and high practical value for development of printed electronic industry. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing graphene/metal nano belt composite conductive ink, comprising (i) mixing uniformly with graphene, carbon black, graphite and metal nano belt based on preset ratio, then adding coupling agent auxiliary agent, and subjecting to modifying treatment to obtain pretreated conductive filler, (ii) placing polymer binder resin and anti-precipitating resin in a heated reaction vessel, adding solvent wetting resin, heating the mixture to 40-100 degrees C, reacting for 0.5-12 hours under stirring condition, dissolving the resin completely, adding antifoaming agent, adhesion promoter, wetting agent, flatting agent, emulsifier and drier into organic liquid phase, dispersing under stirring condition and dissolving uniformly, then cooling to obtain organic phase solution, (iii) adding slowly pretreated conductive filler obtained in step (i) into the organic phase solution obtained in step (ii) under stirring condition to ensure complete wetting of the conductive filler powder and uniform dispersion in the organic phase solution to obtain conductive ink primary product, (iv) placing the conductive ink primary product in a container of a high-speed shear dispersing machine, carrying out high speed solid-liquid shear dispersion or high speed mixed milling in ball mill, then transferring into a three roll mill and grinding until fineness reaches to 5-10 mu m to obtain homogeneous final product; and (2) use method of graphene/metal nano belt composite conductive ink, comprising carrying out screen printing, flexographic printing, gravure printing or inkjet printing on the substrate of the conductive circuit by conductive ink.